Multicast session management system

• US 7,477,617 B2
• Filed: 02/15/2005
• Issued: 01/13/2009
• Est. Priority Date: 05/23/2003
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Yoshiba, Harumine, Chen, Shiwen, Li, Hongbing
• Primary Examiner(s): Pham; Chi H.
• Assistant Examiner(s): Phan; Tri H.
• Application Number:
  US11/058,559
• Publication Number:
  US 20050157742A1
• Time in Patent Office: 1,428 Days
• Field of Search: 370/312, 370/390, 370/432, 709223-226, 709227-229, 707/10
• US Class Current: 370/312
• CPC Class Codes: H04L 12/1877 Measures taken prior to transmission
• CPC Class Codes: H04L 12/1886 with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains

Abstract

A centralized multicast session management system is provided for managing resources in a multicast environment. The session management system includes: at least one multicast application that initiates a request for a multicast session; a session manager is configured to receive the session request from the multicast application and to assign a multicast address for the requested multicast session; and a routing and network manager for managing network resources, where the session manager interacts with the routing and network manager to allocate network resources for the requested multicast session before the multicast address is communicated to the multicast application.

Claims

1. A multicast session management system comprising:

a multicast application that initiates a request for a multicast session;

a session manager receives the session request from the multicast application that assigns a multicast address for the requested multicast session; and

a routing and network manager for managing network resources, wherein the session manager interacts with the routing and network manager to allocate network resources for the requested multicast session before the multicast address is communicated to the multicast application, wherein the routing and network manager receives flow pattern information for the requested multicast session and determines at least one path for the requested multicast session.

2. The multicast session management system of claim 1 wherein the session manager maintains a pool of available multicast addresses and selects an available multicast address from the pool upon receipt of the session request.

3. The multicast session management system of claim 1 wherein the session manager interfaces with an external server to obtain an available multicast address in accordance with Multicast Address Dynamic Client Allocation Protocol.

4. The multicast session management system of claim 1 further comprises a security manager that issues digital certificates.

5. The multicast session management system of claim 4 wherein the session manager is in data communication with the security manager and validates digital certificates with the security manager.

6. The multicast session management system of claim 1 wherein the routing and network manager communicates a multicast address associated with an existing path to the session manager when the existing path can be used by the requested multicast session.

7. The multicast session management system of claim 1 wherein the routing and network manager requests a multicast address be assigned by the session manager when at least one new path is needed for the requested multicast session.

8. A multicast session manager for a multicast distribution system, comprising:

a session registry that stores session information for registered multicast sessions, including an assigned multicast address for each registered session;

a session management service that receives a request for a multicast session from a multicast application and assigns a multicast address for the requested multicast session; and

a network management interface that interfaces with an external routing and network manager to allocate network resources for the requested multicast session, wherein the session management service communicates the multicast address to the multicast application only after network resources have been allocated for the requested multicast session, the network management interface communicates flow pattern information for the requested multicast session to the routing and network manager.

9. The multicast session manager of claim 8 further comprises a pool of available multicast addresses which may be assigned to a requested multicast session.

10. The multicast session manager of claim 8 further comprises an address interface that interfaces with an external server to obtain an available multicast address for a requested multicast session.

11. The multicast session manager of claim 8 further comprises a security management interface that interfaces with a security manager to obtain and validate digital certificates.

12. The multicast session manager of claim 8 wherein the network management interface receives a multicast address associated with an existing path from the routing and network manager when the existing path can be used by the requested multicast session and the session management service updates the session registry with the multicast address assigned to the requested multicast session.

13. The multicast session manager of claim 8 wherein the network management interface receives a request for a multicast address to be assigned when at least one new path is needed for the requested multicast session and communicates an assigned multicast address to the routing and network manager.

14. The multicast session manager of claim 8 further comprises a pool of available transport layer port numbers, wherein the session management service assigns a port number for each channel associated with a requested multicast session.

15. The multicast session manager of claim 8 wherein the session management service spawns a session monitor for each registered multicast session.